periodic-function

noun Mathematics.

a function of a real or complex variable that is periodic.

Compare periodic¹ ( def 5 ).

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periodic function (ˌpɪərɪˈɒdɪk)

—n
	maths a function, such as sin x, whose value is repeated at constant intervals

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00:10

Periodic-function is always a great word to know.

So is ninnyhammer. Does it mean:

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

a fool or simpleton; ninny.

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periodic-function

per·i·od·ic func·tion